| Gb | Eng |
|---|---|
| 流体运动由重力等外力引起的流体运动 | Fluid motion caused by an external force such as gravity. |
| 重力天体如地球，所施加的自然吸引力，如地球，对处于或接近其表面的物体有将它们拉向其中心的趋势 | The natural force of attraction exerted by a celestial body, such as Earth, upon objects at or near its surface, tending to draw them toward the center of the body. |